Choose from the menu: 'Package' 'Force Version'.Choose your preferred version:Apply the changes.To make sure the package will not be updated, choose from the menu: 'Package' 'Lock version':More information on how to keep- or revert to previous packages can be found. In my case, that is only the version you do not want (since I run 14.04, If I remember well you run 12.04):In your case, the earlier version will be listed as well, I will use the example on Firefox here to show how to return to an earlier version. Here you can see what versions are available. If you want to keep- or revert to an older version of your software, the most convenient way is to use Synaptic Package manager: sudo apt-get install synapticOnce installed, open Synaptic, look up Google Chrome, select it and choose from the menu: 'Package' 'Properties', choose the 'Versions' tab. How To Roll Back Firefox Update Version.